Eades, J.Hayano, R. S.Hori, M.Ishikawa, T.Sakaguchi, J.2004-12-032004-12-0320012001http://hdl.handle.net/2003/90010.17877/DE290R-10786enThe American Physical SocietyPhysical Review Letters530Sub-ppm Laser Spectroscopy of Antiprotonic Helium and a CPT-Violation Limit on the Antiprotonic Charge and Mass10.1103/PhysRevLett.87.093401article (journal)